<template>
 <div class="icons">
   <swiper :options="swiperOption">
     <swiper-slide v-for="(page,index) of pages" :key="index">
   <div class="icon" v-for="item of page" :key="item.id">
     <div class="icon-img">
     <img class="icon-img-content" :src="item.imgUrl"/>
     </div>
     <p class="icon-desc">{{item.desc}}</p>
   </div>
     </swiper-slide>
   </swiper>
 </div>
</template>

<script>
export default {
  name: 'HomeIcons',
  props: {
    list: Array
  },
  data () {
    return {
      swiperOption: {
        autoplay: false
      }
    }
  },
  // 在计算属性里定义一个pages数据,它是由一个函数返回的数据
  computed: {
    // eslint-disable-next-line vue/return-in-computed-property
    pages () {
      // eslint-disable-next-line no-unused-vars
      const pages = []
      // 对iconList里的每一项数据循环会得到两个参数循环项item和循环项对应的下标index
      this.list.forEach((item, index) => {
        const page = Math.floor(index / 8)
        if (!pages[page]) {
          pages[page] = []
        }
        pages[page].push(item)
      })
      return pages
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  @import "~styles/mixins.styl"
   .icons >>> .swiper-container
     height :0
     padding-bottom :50%
     .icons
       margin-top :.2rem
     .icon
       position :relative
       overflow :hidden
       float :left
       width :25%
       height:0
       padding-bottom :25%
     .icon-img
         position :absolute
         top:0
         left:0
         right:0
         bottom:.44rem
         box-sizing :border-box
         padding .1rem
       .icon-img-content
          display:block
          margin 0 auto
          height :100%
     .icon-desc
       position :absolute
       left:0
       right:0
       bottom:0
       height :.44rem
       line-height .44rem
       text-align :center
       color :$darkTextColor
       ellipse()
</style>
